Managing water addition to a degraded core [electronic resource].

Published:: Rockville, Md. : U.S. Nuclear Regulatory Commission, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 19 pages : digital, PDF file
Additional Creators:: U.S. Nuclear Regulatory Commission and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

In this paper we present information that can be used in severe accident management by providing an improved understanding of the effects of water addition to a degraded core. This improved understanding is developed using a diagram showing a sequence of core damage states. Whenever possible, a temperature and a time after accident initiation are estimated for each damage state in the sequence diagram. This diagram can be used to anticipate the evolution of events during an accident. Possible responses of plant instruments are described to identify these damage states and the effects of water addition. The rate and amount of water addition needed (1) to remove energy from the core, (2) to stabilize the core or (3) to not adversely affect the damage progression, are estimated. Analysis of the capability to remove energy from large cohesive and particulate debris beds indicates that these beds may not be stabilized in the core region and they may partially relocate to the lower plenum of the reactor vessel.

Report Numbers:

E 1.99:egg-m--91375
E 1.99: conf-911079--30
conf-911079--30
egg-m--91375

Subject(s):

General Studies Of Nuclear Reactors

Other Subject(s):

Note:

Published through SciTech Connect.
12/31/1991.
"egg-m--91375"
" conf-911079--30"
"DE92010807"
19. Nuclear Regulatory Commission (NRC) water reactor safety information meeting,Bethesda, MD (United States),28-30 Oct 1991.
Hanson, D.J.; Odar, F.; Kuan, P.
EG and G Idaho, Inc., Idaho Falls, ID (United States)

Funding Information:

AC07-76ID01570

View MARC record | catkey: 14365497